Picture Perfect Park Party / Sun Block Hero Celebration Day is coming to an end; the big finale is a slideshow of the everyday heroes of Pretty Big City. When the screen rips during the event, the Mechas need to find something flat and opaque to show off the photos and celebrate the city’s heroes properly. The people of Pretty Big City are cooling off on a hot day with an ice slide in the park … but the situation gets slippery when the ice slide starts melting. The Mechas hunt for something to slow down the melting process and protect their friends’ summer fun.